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© Getty Images
0 / 30 Fotos
H1N1 Influenza: 2009-2010
- In April 2009, two children in San Diego contracted a new strain of Influenza A, which made the jump from pigs to humans in Mexico. Although viral transmission from animals to people isn't unheard of, it becomes a problem when the same strain is transmitted from person to person.
© Getty Images
1 / 30 Fotos
H1N1 Influenza: 2009-2010
- In this case, the virus was found to be a novel genetic remix of both swine and human flu viruses, although neither child had direct contact with pigs.
© Getty Images
2 / 30 Fotos
H1N1 Influenza: 2009-2010
- Both patients recovered, but the virus showed resistance to two antiviral drugs. By the end of that same month, the WHO declared the first public health emergency since the formation of the International Health Regulations in 2007.
© Getty Images
3 / 30 Fotos
H1N1 Influenza: 2009-2010
- One month after its detection in the US, there were 13,000 cases across 46 countries, believed to be accelerated by airline travel. An estimated 123,000 to 203,000 people died from H1N1 Influenza. Although an effective vaccine was developed, it came about fairly late after the peak of illness.
© Getty Images
4 / 30 Fotos
Poliomyelitis (polio): 2014-ongoing
- The WHO declared polio a public health emergency in 2014, even though there were only 74 global cases at the time.
© Getty Images
5 / 30 Fotos
Poliomyelitis (polio): 2014-ongoing
- Ten countries were considered to have active transmission of the virus, and it was feared that it would spread with air travel.
© Getty Images
6 / 30 Fotos
Poliomyelitis (polio): 2014-ongoing
- In July 2022, an unvaccinated man in New York was found to have polio, likely contracted from another person who had traveled abroad. The public health emergency by the WHO remains active as of August 2024.
© Getty Images
7 / 30 Fotos
Western Africa Ebola: 2014-2016
- The largest Ebola outbreak in history included 28,000 cases and 11,310 deaths, a case-fatality rate of 40%. The death rate for health care and aid workers was particularly high.
© Getty Images
8 / 30 Fotos
Western Africa Ebola: 2014-2016
- Believed to have originated in Guinea in January 2014, the virus circulated swiftly to neighboring Liberia and Sierra Leon. The WHO declared it a public health emergency five months after it was first notified, a delay which drew much criticism.
© Getty Images
9 / 30 Fotos
Western Africa Ebola: 2014-2016
- Through education about prevention programs and the use of protective personal equipment (PPE), the virus was eventually stamped out.
© Getty Images
10 / 30 Fotos
Western Africa Ebola: 2014-2016
- A clinical trial of an Ebola vaccine took place between August 2015 and January 2016. The drug had an estimated efficacy of 100% when given to primary and secondary contacts of confirmed Ebola patients.
© Getty Images
11 / 30 Fotos
Zika: 2016
- In 2015, doctors in Brazil began noticing cases of microcephaly in infants. This birth defect is characterized by a smaller-than-normal head, a smaller and underdeveloped brain, and other neurological issues.
© Getty Images
12 / 30 Fotos
Zika: 2016
- The number of cases prompted a public health emergency declaration in early 2016. At the time, it wasn't known if the Zika virus was responsible, but these issues correlated with times and places of virus outbreaks.
© Getty Images
13 / 30 Fotos
Zika: 2016
- Zika was the first arbovirus, a virus transmitted by insects (in this case mosquitos in the Aedes genus), to cause an international public health emergency.
© Getty Images
14 / 30 Fotos
Zika: 2016
- The high incidence of infection in the Americas quickly led to herd immunity, and the outbreak subsided within the year.
© Getty Images
15 / 30 Fotos
Democratic Republic of Congo Ebola: 2019-2020
- Ebola struck again, this time in the Democratic Republic of Congo (DRC). The WHO was first notified of cases on August 1, 2018. By the end of that year, it was the country’s largest outbreak of the disease and the world's second-largest since the Ebola West African outbreak a few years earlier.
© Getty Images
16 / 30 Fotos
Democratic Republic of Congo Ebola: 2019-2020
- But it wasn't declared a public health emergency until nearly a year later, in July 2019, when it reached Goma, a city with an international airport. This outbreak occurred in a war zone and at least 70 Ebola patients and responders were injured. Eleven were killed in targeted attacks by armed groups.
© Getty Images
17 / 30 Fotos
Democratic Republic of Congo Ebola: 2019-2020
- However, this was the first time an Ebola vaccine was available and administered widely from the start of the outbreak. Thanks to the vaccine, as well as extensive quarantine and isolation measures, this Ebola emergency was declared over in 2020.
© Getty Images
18 / 30 Fotos
COVID-19: 2020-2023
- A severe acute respiratory syndrome that doesn't need much introduction, the coronavirus emerged in a meat market in Wuhan, China, in December 2019. It's believed to be zoonotic, having jumped from animals to people in the market.
© Getty Images
19 / 30 Fotos
COVID-19: 2020-2023
- A surprising feature of the virus is the numerous ways and varying intensities in which symptoms manifest. Respiratory symptoms, blood clotting complications, and loss of taste or smell are the most common. In some cases, the virus may cause no symptoms at all.
© Getty Images
20 / 30 Fotos
COVID-19: 2020-2023
- On January 30, 2020, the WHO declared the coronavirus a public health emergency of international concern. In March 2020, the WHO declared a pandemic.
© Getty Images
21 / 30 Fotos
COVID-19: 2020-2023
- As of July 2024, more than 775 million cases of COVID-19 have been reported worldwide and more than seven million people have died of the disease. The WHO ended the COVID-19 emergency on May 5, 2023, though the virus continues to circulate.
© Getty Images
22 / 30 Fotos
Mpox: 2022-2023
- On July 24, 2022, the WHO declared an outbreak of mpox a public health emergency, citing its rapid spread across the globe.
© Getty Images
23 / 30 Fotos
Mpox: 2022-2023
- Although the disease is endemic in central Africa where small outbreaks occur, between June and July 2022, cases jumped from 3,000 to 16,000 in 75 countries.
© Getty Images
24 / 30 Fotos
Mpox: 2022-2023
- Less contagious than SARS-CoV-2, mpox is primarily transmitted through intimate touch and sex. It can also cling to used towels and bed sheets, making transmission among people in the same household possible. Symptoms are typically mild, though can be very painful and present as a fever and blistering rash.
© Getty Images
25 / 30 Fotos
Mpox: 2022-2023
- Citing control of transmission, the WHO ended the mpox emergency on May 11, 2023. As of August 2024, there have been 99,518 total cases across 122 countries and 207 total deaths worldwide.
© Getty Images
26 / 30 Fotos
Clade 1b Mpox: 2024-ongoing
- A different version of the mpox virus, called clade 1b, began spreading from the DRC to Kenya, Rwanda, and Uganda in 2024.
© Getty Images
27 / 30 Fotos
Clade 1b Mpox: 2024-ongoing
- Over 15,000 cases have been reported in the DRC so far, which prompted the WHO to declare another mpox public health emergency on August 14, 2024.
© Getty Images
28 / 30 Fotos
Clade 1b Mpox: 2024-ongoing
- At the time of the declaration, the outbreak had spread to 13 African countries, many of which had no prior history of cases. A case of mpox has also been found in Sweden. Sources: (World Health Organization) (Mental Floss) (BBC) See also: Long before COVID: The deadliest pandemics in history
© Getty Images
29 / 30 Fotos
© Getty Images
0 / 30 Fotos
H1N1 Influenza: 2009-2010
- In April 2009, two children in San Diego contracted a new strain of Influenza A, which made the jump from pigs to humans in Mexico. Although viral transmission from animals to people isn't unheard of, it becomes a problem when the same strain is transmitted from person to person.
© Getty Images
1 / 30 Fotos
H1N1 Influenza: 2009-2010
- In this case, the virus was found to be a novel genetic remix of both swine and human flu viruses, although neither child had direct contact with pigs.
© Getty Images
2 / 30 Fotos
H1N1 Influenza: 2009-2010
- Both patients recovered, but the virus showed resistance to two antiviral drugs. By the end of that same month, the WHO declared the first public health emergency since the formation of the International Health Regulations in 2007.
© Getty Images
3 / 30 Fotos
H1N1 Influenza: 2009-2010
- One month after its detection in the US, there were 13,000 cases across 46 countries, believed to be accelerated by airline travel. An estimated 123,000 to 203,000 people died from H1N1 Influenza. Although an effective vaccine was developed, it came about fairly late after the peak of illness.
© Getty Images
4 / 30 Fotos
Poliomyelitis (polio): 2014-ongoing
- The WHO declared polio a public health emergency in 2014, even though there were only 74 global cases at the time.
© Getty Images
5 / 30 Fotos
Poliomyelitis (polio): 2014-ongoing
- Ten countries were considered to have active transmission of the virus, and it was feared that it would spread with air travel.
© Getty Images
6 / 30 Fotos
Poliomyelitis (polio): 2014-ongoing
- In July 2022, an unvaccinated man in New York was found to have polio, likely contracted from another person who had traveled abroad. The public health emergency by the WHO remains active as of August 2024.
© Getty Images
7 / 30 Fotos
Western Africa Ebola: 2014-2016
- The largest Ebola outbreak in history included 28,000 cases and 11,310 deaths, a case-fatality rate of 40%. The death rate for health care and aid workers was particularly high.
© Getty Images
8 / 30 Fotos
Western Africa Ebola: 2014-2016
- Believed to have originated in Guinea in January 2014, the virus circulated swiftly to neighboring Liberia and Sierra Leon. The WHO declared it a public health emergency five months after it was first notified, a delay which drew much criticism.
© Getty Images
9 / 30 Fotos
Western Africa Ebola: 2014-2016
- Through education about prevention programs and the use of protective personal equipment (PPE), the virus was eventually stamped out.
© Getty Images
10 / 30 Fotos
Western Africa Ebola: 2014-2016
- A clinical trial of an Ebola vaccine took place between August 2015 and January 2016. The drug had an estimated efficacy of 100% when given to primary and secondary contacts of confirmed Ebola patients.
© Getty Images
11 / 30 Fotos
Zika: 2016
- In 2015, doctors in Brazil began noticing cases of microcephaly in infants. This birth defect is characterized by a smaller-than-normal head, a smaller and underdeveloped brain, and other neurological issues.
© Getty Images
12 / 30 Fotos
Zika: 2016
- The number of cases prompted a public health emergency declaration in early 2016. At the time, it wasn't known if the Zika virus was responsible, but these issues correlated with times and places of virus outbreaks.
© Getty Images
13 / 30 Fotos
Zika: 2016
- Zika was the first arbovirus, a virus transmitted by insects (in this case mosquitos in the Aedes genus), to cause an international public health emergency.
© Getty Images
14 / 30 Fotos
Zika: 2016
- The high incidence of infection in the Americas quickly led to herd immunity, and the outbreak subsided within the year.
© Getty Images
15 / 30 Fotos
Democratic Republic of Congo Ebola: 2019-2020
- Ebola struck again, this time in the Democratic Republic of Congo (DRC). The WHO was first notified of cases on August 1, 2018. By the end of that year, it was the country’s largest outbreak of the disease and the world's second-largest since the Ebola West African outbreak a few years earlier.
© Getty Images
16 / 30 Fotos
Democratic Republic of Congo Ebola: 2019-2020
- But it wasn't declared a public health emergency until nearly a year later, in July 2019, when it reached Goma, a city with an international airport. This outbreak occurred in a war zone and at least 70 Ebola patients and responders were injured. Eleven were killed in targeted attacks by armed groups.
© Getty Images
17 / 30 Fotos
Democratic Republic of Congo Ebola: 2019-2020
- However, this was the first time an Ebola vaccine was available and administered widely from the start of the outbreak. Thanks to the vaccine, as well as extensive quarantine and isolation measures, this Ebola emergency was declared over in 2020.
© Getty Images
18 / 30 Fotos
COVID-19: 2020-2023
- A severe acute respiratory syndrome that doesn't need much introduction, the coronavirus emerged in a meat market in Wuhan, China, in December 2019. It's believed to be zoonotic, having jumped from animals to people in the market.
© Getty Images
19 / 30 Fotos
COVID-19: 2020-2023
- A surprising feature of the virus is the numerous ways and varying intensities in which symptoms manifest. Respiratory symptoms, blood clotting complications, and loss of taste or smell are the most common. In some cases, the virus may cause no symptoms at all.
© Getty Images
20 / 30 Fotos
COVID-19: 2020-2023
- On January 30, 2020, the WHO declared the coronavirus a public health emergency of international concern. In March 2020, the WHO declared a pandemic.
© Getty Images
21 / 30 Fotos
COVID-19: 2020-2023
- As of July 2024, more than 775 million cases of COVID-19 have been reported worldwide and more than seven million people have died of the disease. The WHO ended the COVID-19 emergency on May 5, 2023, though the virus continues to circulate.
© Getty Images
22 / 30 Fotos
Mpox: 2022-2023
- On July 24, 2022, the WHO declared an outbreak of mpox a public health emergency, citing its rapid spread across the globe.
© Getty Images
23 / 30 Fotos
Mpox: 2022-2023
- Although the disease is endemic in central Africa where small outbreaks occur, between June and July 2022, cases jumped from 3,000 to 16,000 in 75 countries.
© Getty Images
24 / 30 Fotos
Mpox: 2022-2023
- Less contagious than SARS-CoV-2, mpox is primarily transmitted through intimate touch and sex. It can also cling to used towels and bed sheets, making transmission among people in the same household possible. Symptoms are typically mild, though can be very painful and present as a fever and blistering rash.
© Getty Images
25 / 30 Fotos
Mpox: 2022-2023
- Citing control of transmission, the WHO ended the mpox emergency on May 11, 2023. As of August 2024, there have been 99,518 total cases across 122 countries and 207 total deaths worldwide.
© Getty Images
26 / 30 Fotos
Clade 1b Mpox: 2024-ongoing
- A different version of the mpox virus, called clade 1b, began spreading from the DRC to Kenya, Rwanda, and Uganda in 2024.
© Getty Images
27 / 30 Fotos
Clade 1b Mpox: 2024-ongoing
- Over 15,000 cases have been reported in the DRC so far, which prompted the WHO to declare another mpox public health emergency on August 14, 2024.
© Getty Images
28 / 30 Fotos
Clade 1b Mpox: 2024-ongoing
- At the time of the declaration, the outbreak had spread to 13 African countries, many of which had no prior history of cases. A case of mpox has also been found in Sweden. Sources: (World Health Organization) (Mental Floss) (BBC) See also: Long before COVID: The deadliest pandemics in history
© Getty Images
29 / 30 Fotos
Times the WHO declared a public health emergency
These are the biggest public health emergencies in recent years
© Getty Images
For the second time in three years, the World Health Organization (WHO) has declared that mpox, an infectious viral disease previously known as monkeypox, presented a global health emergency. The declaration was issued in August 2024 per the International Health Regulations, a legally binding agreement between 194 countries to help prevent and take measures to curb public health risks with the potential for international spread.
From COVID-19 to mpox, click on to learn more about the biggest public health emergencies in recent years.
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